JPS5657027A - Cinecamera - Google Patents

Cinecamera

Info

Publication number
JPS5657027A
JPS5657027A JP13340979A JP13340979A JPS5657027A JP S5657027 A JPS5657027 A JP S5657027A JP 13340979 A JP13340979 A JP 13340979A JP 13340979 A JP13340979 A JP 13340979A JP S5657027 A JPS5657027 A JP S5657027A
Authority
JP
Japan
Prior art keywords
light receiving
focusing
motor
receiving element
range finding
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP13340979A
Other languages
Japanese (ja)
Inventor
Noritsugu Hirata
Masamichi Toyama
Hideto Iwama
Hidekazu Okajima
Akimasa Nishimura
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Canon Inc
Original Assignee
Canon Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Canon Inc filed Critical Canon Inc
Priority to JP13340979A priority Critical patent/JPS5657027A/en
Priority to US06/196,441 priority patent/US4351590A/en
Priority to DE3039155A priority patent/DE3039155C2/en
Publication of JPS5657027A publication Critical patent/JPS5657027A/en
Pending legal-status Critical Current

Links

Landscapes

  • Focusing (AREA)
  • Automatic Focus Adjustment (AREA)

Abstract

PURPOSE: To improve the range finding precision and operation efficiency, by projecting the light emitting material image of the infrared emission diode to the object side from the main body of camera and by detecting the maximum value of the output voltage obtained by the light receiving element to perform focus detection.
CONSTITUTION: When the projection light from light emission diode 20 coincides with the light receiving range of light receiving element 23 on the object and the maximum value of the output voltage from light receiving element 23 is detected, motor M3 for focusing is rorated to perform the focusing operation. Worm 129 fixed to the output shaft of this motor M3 gears with worm wheel 121, and cam 121a is fixed to the worm wheel, and holding plate 105, cam ring 106, and front ball holding frame 107 are moved forward or backward in the optical axis direction through guide bar 109 according to normal or inverse rotation of motor M3, thereby performing focusing. Thus, the range finding precision is not dependent upon object luminance, and consequently, the range finding precision can be improved, and operation efficiency can be improved because driving force of the focusing lens is small.
COPYRIGHT: (C)1981,JPO&Japio
JP13340979A 1979-10-16 1979-10-16 Cinecamera Pending JPS5657027A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP13340979A JPS5657027A (en) 1979-10-16 1979-10-16 Cinecamera
US06/196,441 US4351590A (en) 1979-10-16 1980-10-14 Motion picture camera with automatic focusing device
DE3039155A DE3039155C2 (en) 1979-10-16 1980-10-16 Film camera with an automatic focusing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13340979A JPS5657027A (en) 1979-10-16 1979-10-16 Cinecamera

Publications (1)

Publication Number Publication Date
JPS5657027A true JPS5657027A (en) 1981-05-19

Family

ID=15104083

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13340979A Pending JPS5657027A (en) 1979-10-16 1979-10-16 Cinecamera

Country Status (1)

Country Link
JP (1) JPS5657027A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109814320A (en) * 2019-03-07 2019-05-28 北京空间机电研究所 A kind of focus adjusting mechanism based on disc cam

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109814320A (en) * 2019-03-07 2019-05-28 北京空间机电研究所 A kind of focus adjusting mechanism based on disc cam

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